{"id":"W1509868282","doi":"10.3386/w17636","title":"Rewarding Altruism? A Natural Field Experiment","year":2011,"lang":"en","type":"report","venue":"National Bureau of Economic Research","topic":"Experimental Behavioral Economics Studies","field":"Social Sciences","cited_by":17,"is_retracted":false,"has_abstract":true,"ca_institutions":"University of Toronto","funders":"National Science Foundation","keywords":"Surprise; Incentive; Altruism (biology); Donation; Blood donations; Social psychology; Psychology; Natural experiment; Prosocial behavior; Intervention (counseling); Economics; Microeconomics; Blood donor; Medicine","routes":{"ca_aff":true,"ca_fund":false,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"codex-gemma-dda1882f352a","candidate_categories":["metaepi_narrow","insufficient_payload"],"consensus_categories":[],"category_scores_codex":[0.006082387,0.0002424497,0.0005900847,0.0006424068,0.0006025911,0.00009458469,0.0008383297,0.0004427663,0.001852844],"category_scores_gemma":[0.001294425,0.0002696205,0.0002905608,0.0001391655,0.0007103265,0.0002659267,0.0004437071,0.0008152914,0.0002892985],"about_ca_system_candidate":true,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.00610019,"about_ca_system_score_gemma":0.005294978,"about_ca_topic_candidate":true,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.05121404,"about_ca_topic_score_gemma":0.003407629,"domain_scores_codex":[0.9960743,0.0002816824,0.0007645958,0.0006195715,0.001610575,0.000649261],"domain_scores_gemma":[0.9968829,0.0008904412,0.0003787741,0.0003011051,0.001386244,0.000160595],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"theoretical_or_conceptual","study_design_gemma":"not_applicable","study_design_scores_codex":[0.0001061335,0.0002024525,0.002290599,0.00007858256,0.0003652177,0.000008797967,0.009347451,0.000004645908,0.000602009,0.6521658,0.3314443,0.003383977],"study_design_scores_gemma":[0.001085602,0.0005489487,0.0004818745,0.0005037397,0.00005925796,0.00001459027,0.01637033,0.00002682536,0.02334745,0.2718245,0.6842242,0.001512717],"study_design_candidate":"not_applicable","study_design_consensus":null,"genre_codex":"other","genre_gemma":"empirical","genre_scores_codex":[0.005868058,0.003762869,3.278245e-7,0.0008199918,0.002348976,0.0008690795,0.00003121191,0.00003112362,0.9862683],"genre_scores_gemma":[0.9616593,0.003939212,0.0003082205,0.00004105116,0.001722806,0.0004206215,0.0000819668,0.00004614722,0.03178074],"genre_candidate":"other","genre_consensus":null,"teacher_disagreement_score":0.9557912,"threshold_uncertainty_score":0.9999756,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.5531828343491543,"score_gpt":0.6017014197933672,"score_spread":0.04851858544421295,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}